dahua Indoor Series LED Display Module

Foreword 

Safety Instructions

The following signal words might appear in the manual.

Signal Words	Meaning
	Indicates a high potential hazard which, if not avoided, will result in death or serious injury.
	Indicates a medium or low potential hazard which, if not avoided, couldresult in slight or moderate injury.
	Indicates a potential risk which, if not avoided, could result in property damage, data loss, reductions in performance, or unpredictable results.
	Provides methods to help you solve a problem or save time.
	Provides additional information as a supplement to the text.

Revision History

Version	Revision Content	Release Time
V1.0.0	First release.	July 2025

Important Safeguards and Warnings

This section introduces content covering the proper handling of the device, hazard prevention, and prevention of property damage. Read carefully before using the device, and comply with the guidelines when using it.

Transportation Requirements

• The packaged LED display modules can be transported by any means of transportation (such as cars, trains, planes, etc.), but during the transportation process, they should be protected from rain, prolonged exposure to the sun, contact with corrosive gases and mechanical damage.

Storage Requirements

• Storage environment for LED display modules
  • Storage temperature: -20℃~60℃
  • Storage humidity: 10%~65%RH
• The surrounding environment contains no acidic or alkaline gases, nor any mechanical vibrations, shocks or strong magnetic fields.
• If the storage period exceeds 6 months, the container should be opened for inspection every 6 months, and dehumidification should be carried out as required.

Installation Requirements 

Danger

• Before connecting the power terminal, make sure to identify the positive and negative poles of the terminal. Do not connect the power terminal in the wrong direction.
• When the surface of the module needs cleaning, please do not use rags, water-containing objects, hard objects, etc. for cleaning.

Warning

• Do not forcefully pull or tear the wires; excessive force may cause the copper column to break or damage the PCB circuitry.
• Do not use blades or any sharp objects to forcefully disassemble the module.
• During assembly, operators must wear anti-static gloves.
• Be careful to protect the corner or edge light beads from getting damaged when installing.

Operation Requirements 

Danger

• Before operation, make sure to cut off the power supply and prohibit any live operation.
• Be sure to use it in an environment that is far away from flammable, explosive substances, gases and dust.

Warning

• During the use of the product, the power supply should not be turned on and off continuously. The interval between each power switch operation should be at least 1 minute.
• During operation and usage, measures for lightning protection and static electricity prevention should be taken; the box body and the steel structure must be grounded.
• During the process of disassembling and assembling the product, avoid using tools to strike the product.
• When disassembling or assembling the product, handle it gently and do not forcefully remove or place it.

Maintenance Requirements 

• This product should not be turned off for a long time. It is recommended to use it at least once every half a month, with each power-on session lasting for more than 4 hours. In a high-humidity environment, it is suggested to use it once every 7 days, with each power-on session lasting for more than 4 hours.
• This product does not allow the display of the highest brightness all-white screen for more than 30 minutes. It is recommended to mainly play dynamic videos.
• If the product malfunctions during the warranty period, please send it back to our company for repair or follow the guidance of our after-sales staff for repair.

Product Overview

Product Introduction 

• The LED indoor display module adopts ultra-small dot pitch, enabling it to achieve extremely high resolution indoors and presenting breathtakingly clear image effects. It has a wide viewing angle, and regardless of viewing from top, bottom, left, or right, the colors remain true and vibrant, meeting the needs of viewing from different angles. It uses a three-in-one LED, with excellent RGB color mixing effect, making the color display more vivid and the image more realistic.
• The screen body occupies a small volume, the box is lightweight, and it features a high-density full-color indoor screen. The display image is detailed and realistic. It adopts surface-mount packaging technology, has good uniformity, brightness and viewing angle, and enables quick installation and disassembly, saving your precious time and labor costs.
• The LED module adopts matte black lamps with high-grade chip packaging from globally renowned manufacturers, which ensures the lifespan and display quality of the display screen.
• The driving IC uses high refresh rate and high grayscale constant current driving ICs from top global manufacturers, with excellent driving performance and high reliability.
• The PCB board adopts multi-layer circuit design to ensure uniform current distribution on the lamp board, good heat dissipation, and prevent color blocks from appearing under low grayscale conditions, enhancing the anti-electromagnetic interference ability.
• The connectors use high-quality connectors, with no wiring connections inside the box, ensuring stability and reliability.
• The dedicated 14BIT high grayscale, high refresh rate constant current IC for driving and control has a unique blanking circuit to protect the LED and prevent sudden voltage leakage.
• This product is widely used in government office halls, enterprise and institution halls, meeting rooms, exhibition halls, commercial buildings, stages, and event venues, etc.

Product Feature 

• Color Display
  The LED display module can present a wide range of colors and can be applied in various scenarios to meet diverse visual needs. It is widely used in places such as stage rental and advertising promotion that require colorful displays.
• Image and Video Display
  It can display images and videos and other contents. The main controller converts the signal from the graphics card into the signal format and data required by the LED display screen. The shift register with grayscale control function is used for the display of image screens and the control unit, allowing the LED display module to present clear, vivid images and smooth videos.

Installation or Configuration

Module Installation Requirements

• Fixed module screws
  The fixed module uses M4 screws. The length of the screw protruding from the box should not exceed 5mm. GB9074.4 screws (as shown in the following figure, the spring washer, washer and screw cannot be separated) can be used to reliably fix the module. Where the box structure does not allow the use of GB9074.4 screws, GB818 screws (see the following figure) can be used. For screw selection and naming methods, please refer to the corresponding national standards.
• Module Installation
  Align the threaded holes on the back of the module with the corresponding installation holes on the box. Use M4 screws to fix the module onto the box from the inside of the box. Pay attention to the joint gap and ensure it meets the flatness requirements.

Modular Magnetic Installation 

• Requirements for magnetic columns
  Use the M4 magnetic posts commonly used in LED screens
• Module magnetic insertion installation
  Based on the size of the display screen and the module size, the steel frame is designed and manufactured. Generally, 40mm×40mm square steel is used. After the steel frame is installed on-site, the receiving card, power supply, and wires are installed on the steel frame. The magnetic column is installed on the module, and the power line and ribbon of the module are connected. Then, the module is magnetically attached to the steel frame.

 Module Signal Connection Method
The signal wiring of the module is installed in a split connection manner. The split connection can provide a higher refresh rate and better display effect. Each row of the module is respectively connected to the receiving card using a long wiring line. The specific load quantity is the interface number multiplied by 1.

 Module Power Supply Configuration 

Switching power	Single module	Number of modules
supply	current	equipped
5V 40A	4.8A(maximum)	5-7 EA

• Power cord model: One-to-two, 60cm-25cm/15cm, VH4, strip connection line (pure copper or copper-clad aluminum)
• Switching power supply connection method

Figure 2-7 Power connection diagram

 Display Screen Installation Method  

• Wall-mounted installation
  Suitable for installation on indoor screens, with a small area (less than 10 square meters). The wall must be a solid wall. Hollow bricks or simple partition walls are not applicable to this installation method.
  
• Installation of the frame magnetic strip screen
• Design the frame based on the installation area and module size (considering the edge padding and joint gaps). The magnetic back strips are evenly arranged and welded onto the frame using 4cm-wide square steel according to the module size. Finally, the frame is fixed to the wall.
•  Use the common M4 magnetic pins for LED screens.
• For larger screens, it is advisable to use box assembly.
• Embedded installation Suitable for indoor screens with a smaller area. According to the size of the screen body, dig out an area of the same size on the wall, and embed the display screen into the wall. The wall should be a solid wall and be equipped with front maintenance.
• Fixed installation
• Movable base installation: Refers to the base frame being manufactured separately. It can be placed on the ground and moved.
• Fixed seat installation: Refers to a seat frame that is directly connected to the ground or wall.

 NOVA LED Control System Debugging 

• Operating Environment
• Operating System: Chinese and English Windows 98/me/2000/NT/XP/Vista/Win7
• Hardware configuration: CPU: Pentium 2.6GHz or above; Memory: 1024MHz or above; Independent graphics card, standard VGA/DVI dual-output display mode, video memory 512 MHz or above.

Hardware connection

• Install the sending card in the motherboard slot of the desktop computer or in an independent power supply device such as an external sending box, and connect the DVI cable and USB data cable
•  Power on the receiving card and the large-screen display, and connect the receiving card and the sending card using a 56B type network cable. The indicator lights of the receiving card and the sending card will flash when there is normal communication. 
• Confirm hardware connections. Open the debugging software to verify if it is communicating with the transmitting card and the receiving card. 
• Graphics card settings. Right-click on the desktop – Screen Resolution – Detect – Select the “Copy Mode” option.
• Software configuration
  • Installation completed. Open the NovalLCT debugging software icon.
  •  Click “User – Advanced User Login”. In the pop-up dialog box, enter the password “6 66” to\log in. 
  • After logging in, click on: “Display Configuration” (in the area without the display, select the communication port (if the 232 serial cable is not connected, the communication port cannot be selected. You can check the connection status of the 232 serial port in Computer – Management – Device Manager, and install the 232 serial port driver), click “Next”, and you can enter the display configuration page)
  • Display configuration interface – Send card, resolution set to 1920X1080.
  • Display configuration interface – Receiver card – Rules: Set the width and height of a single receiver card inside the box. Scan the QR code on the back of the scanning module, download the loading file from the cloud to the computer, and click “Load from local”, then load the screen receiver card RCFG configuration file. After successful loading, you can set the relevant parameters of the receiver card through the receiver card rules settings. 
  • Send to all receiving cards. Save after the screen is normal.
  •  If the display is abnormal after replacing the module or the box, you can read the correct parameters from another receiving card and send them to all receiving cards. Then the screen parameters will be the same.
  • Display configuration interface – Display connection: The size of the receiving card should be consistent with the height and width of the receiving card interface. 
  • Select the corresponding network port number to connect to the corresponding receiving card wiring diagram (From the front of the screen, based on the connections on the back of the screen, connect to the corresponding receiving card. Right-click to cancel, left-click to select) 
  • After connection is completed, click “Send to Hardware” – “Wired”, and complete the corresponding settings.
  •  On the computer desktop: Right-click – Screen Resolution, project the computer desktop onto the “Copy Mode” LED screen, and the computer signal can be displayed on the wall.
  •  Note: When debugging the controller, you can export and save the configuration file of the receiving card and the connection file of the display screen. If there are problems during the debugging process, you can directly import the original file. Additionally, the brightness of the LED screen can be adjusted through the “Brightness” option on the homepage of the LED debugging software. The adjustment range is from 0 to the maximum value. The indoor screen is generally set at around 60%, and it can also be adjusted according to the actual environment on site.

Appendix 1 Technical Terms

• DVI: It is the abbreviation of Digital Video Interface, which means Digital Video Interface. It is a common digital video signal interface used internationally nowadays.
  VGA: Video Graphics Array, a computer display standard using analog signals proposed by IBM in 1987. The VGA interface is a dedicated interface for computers to output data using the VGA standard.
• LED display module (unit board): Composed of several display pixels, it is the smallest unit structurally independent and capable of forming an LED display screen. It is a basic unit with a determined circuit and installation structure, having display function, and can achieve the display function of the screen through simple assembly.
• LED display screen: A display screen composed of an array of LED devices under certain control methods.

Appendix 2 Security Commitment and Recommendation

Dahua Vision Technology Co., Ltd. (hereinafter referred to as “Dahua”) attaches great importance to cybersecurity and privacy protection, and continues to invest special funds to comprehensively improve the security awareness and capabilities of Dahua employees and provide adequate security for products. Dahua has established a professional security team to provide full life cycle security empowerment and control for product design, development, testing, production, delivery and maintenance. While adhering to the principle of minimizing data collection, minimizing services, prohibiting backdoor implantation, and removing unnecessary and insecure services (such as Telnet), Dahua products continue to introduce innovative security technologies, and strive to improve the product security assurance capabilities, providing global users with security alarm and 24/7 security incident response services to better protect users’ security rights and interests. At the same time, Dahua encourages users, partners, suppliers, government agencies, industry organizations and independent researchers to report any potential risks or vulnerabilities discovered on Dahua devices to Dahua PSIRT, for specific reporting methods, please refer to the cyber security section of Dahua official website.

Product security requires not only the continuous attention and efforts of manufacturers in R&D, production, and delivery, but also the active participation of users that can help improve the environment and methods of product usage, so as to better ensure the security of products after they are put into use. For this reason, we recommend that users safely use the device, including but not limited to:

Account Management

1. Use complex passwords
   Please refer to the following suggestions to set passwords:
   • The length should not be less than 8 characters;
   • Include at least two types of characters: upper and lower case letters, numbers and symbols;
   • Do not contain the account name or the account name in reverse order;
   • Do not use continuous characters, such as 123, abc, etc.;
   • Do not use repeating characters, such as 111, aaa, etc.
2. Change passwords periodically
   It is recommended to periodically change the device password to reduce the risk of being guessed or cracked.
3. Allocate accounts and permissions appropriately
   Appropriately add users based on service and management requirements and assign minimum permission sets to users.
4. Enable account lockout function
   The account lockout function is enabled by default. You are advised to keep it enabled to protect account security. After multiple failed password attempts, the corresponding account and source IP address will be locked.
5. Set and update password reset information in a timely manner
   Dahua device supports password reset function. To reduce the risk of this function being used by threat actors, if there is any change in the information, please modify it in time. When setting security questions, it is recommended not to use easily guessed answers.

Service Configuration 

1. Enable HTTPS
   It is recommended that you enable HTTPS to access Web services through secure channels.
2. Encrypted transmission of audio and video
   If your audio and video data contents are very important or sensitive, we recommend you to use encrypted transmission function in order to reduce the risk of your audio and video data being eavesdropped during transmission.
3. Turn off non-essential services and use safe mode
   If not needed, it is recommended to turn off some services such as SSH, SNMP, SMTP, UPnP, AP hotspot etc., to reduce the attack surfaces.
   If necessary, it is highly recommended to choose safe modes, including but not limited to the following services:
   • SNMP: Choose SNMP v3, and set up strong encryption and authentication passwords.
   • SMTP: Choose TLS to access mailbox server.
   • FTP: Choose SFTP, and set up complex passwords.
   • AP hotspot: Choose WPA2-PSK encryption mode, and set up complex passwords. 2.4 Change HTTP and other default service ports
     It is recommended that you change the default port of HTTP and other services to any port between 1024 and 65535 to reduce the risk of being guessed by threat actors.

Network Configuration

1. Enable Allow list
   It is recommended that you turn on the allow list function, and only allow IP in the allow list to access the device. Therefore, please be sure to add your computer IP address and supporting device IP address to the allow list.
2. MAC address binding
   It is recommended that you bind the IP address of the gateway to the MAC address on the device to reduce the risk of ARP spoofing.
3. Build a secure network environment
   In order to better ensure the security of devices and reduce potential cyber risks, the following are recommended:
   Disable the port mapping function of the router to avoid direct access to the intranet devices from external network;
   According to the actual network needs, partition the network: if there is no communication demand between the two subnets, it is recommended to use VLAN, gateway and other methods to partition the network to achieve network isolation;
   Stablish 802.1x access authentication system to reduce the risk of illegal terminal access to the private network.

Security auditing

1. Check online users
   It is recommended to check online users regularly to identify illegal users.
2. Check device log
   By viewing logs, you can learn about the IP addresses that attempt to log in to the device and key operations of the logged users.
3. Configure network log
   Due to the limited storage capacity of devices, the stored log is limited. If you need to save the log for a long time, it is recommended to enable the network log function to ensure that the critical logs are synchronized to the network log server for tracing.

Software Security

1. Update firmware in time
   According to the industry standard operating specifications, the firmware of devices needs to be updated to the latest version in time in order to ensure that the device has the latest functions and security. If the device is connected to the public network, it is recommended to enable the online upgrade automatic detection function, so as to obtain the firmware update information released by the manufacturer in a timely manner.
2. Update client software in time
   We recommend you to download and use the latest client software.

 Physical protection
It is recommended that you carry out physical protection for devices (especially storage devices), such as placing the device in a dedicated machine room and cabinet, and having access control and key management in place to prevent unauthorized personnel from damaging hardware and other peripheral equipment (e.g. USB flash disk, serial port).

ZHEJIANG DAHUA VISION TECHNOLOGY CO., LTD.

• Address: No. 1399, Binxing Road, Binjiang District, Hangzhou, P. R. China
• Website: www.dahuasecurity.com
• Postcode: 310053
• Email: dhoverseas@dhvisiontech.com
• Tel: +86-571-87688888 28933188

Documents / Resources

dahua Indoor Series LED Display Module [pdf] User Guide Indoor Series LED Display Module, LED Display Module, Display Module, Module

References

• User Manual